﻿using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;
using HJT212_Protocol_DAL.DAO;

namespace HJT212_Protocol_WinServer
{
    static class Program
    {

        /// <summary> 
        /// 该函数设置由不同线程产生的窗口的显示状态。 
        /// </summary> 
        /// <param name="hWnd">窗口句柄</param> 
        /// <param name="cmdShow">指定窗口如何显示</param> 
        /// <returns>如果函数原来可见，返回值为非零；如果函数原来被隐藏，返回值为零。</returns> 
        [DllImport("User32.dll")]
        private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
        /// <summary> 
        /// 该函数将创建指定窗口的线程设置到前台，并且激活该窗口。
        /// </summary> 
        /// <param name="hWnd">将被激活并被调入前台的窗口句柄。</param> 
        /// <returns>如果窗口设入了前台，返回值为非零；如果窗口未被设入前台，返回值为零。</returns> 
        [DllImport("User32.dll")]
        private static extern bool SetForegroundWindow(IntPtr hWnd);
        private const int WS_SHOWNORMAL = 1;
        /// <summary> 
        /// 应用程序的主入口点。 
        /// </summary> 
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.ThreadException += ThreadException;


            //SaveAutoUploadDataDao dao = new SaveAutoUploadDataDao();
            //dao.dd();

            AppDomain currentDomain = AppDomain.CurrentDomain;
            Process instance = RunningInstance();
            if (instance == null)
            {
                currentDomain.UnhandledException += new UnhandledExceptionEventHandler(MyHandler);
                Application.Run(new ServerMainForm());
            }
            else
            {
                HandleRunningInstance(instance);
            }
        }
        /// <summary> 
        /// 获取正在运行的实例，没有运行的实例返回null; 
        /// </summary> 
        public static Process RunningInstance()
        {
            Process current = Process.GetCurrentProcess();
            Process[] processes = Process.GetProcessesByName(current.ProcessName);
            foreach (Process process in processes)
            {
                if (process.Id != current.Id)
                {
                    if (Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)
                    {
                        return process;
                    }
                }
            }
            return null;
        }
        /// <summary> 
        /// 显示已运行的程序。 
        /// </summary> 
        public static void HandleRunningInstance(Process instance)
        {
            ShowWindowAsync(instance.MainWindowHandle, WS_SHOWNORMAL); //显示，可以注释掉 
            SetForegroundWindow(instance.MainWindowHandle);            //放到前端 
        }

        #region 字段
        static log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
        #endregion

        #region 异常控制
        static void MyHandler(object sender, UnhandledExceptionEventArgs args)
        {
            Exception e = (Exception)args.ExceptionObject;
            log.Error("程序运行出现异常", e);

            Restart();
        }

        private static void ThreadException(object sender, ThreadExceptionEventArgs e)
        {
            log.Error("程序运行出现未处理异常", e.Exception);
            //Application.Exit();
            Process.GetCurrentProcess().Kill();

            Restart();
        }

        /// <summary>
        /// 重新启动
        /// </summary>
        private static void Restart()
        {
            Process.Start(Process.GetCurrentProcess().MainModule.FileName);
            Process.GetCurrentProcess().Kill();
        }

        #endregion
    }
}
